Lock mechanism.



No. 836,288. PATBNTED Nov. zo, 190e. H. G. VOIGHT.

LOCK MEGHANISM. APPLICATION FILED sEPT.2g,19o5. l

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PATENTED NOV. 20, 1906.

H. G. VOIGHT.

LOCK MECHANISM.

APPLIOATION FILED sEPT.2a,19o5.

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UNITED STATES PATENT oEEioE.

HENRY Gr.. VOIGHT, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR TO RUSSELL & ERWIN MANUFACTURING COMPANY, OF NEW BRIT- AIN, CONNECTICUT, A CORPORATION OF CONNECTICUT.

.i LOCK MECHANISM.

Specification of Letters Patent.

Patented Nov. 20, 1906.

Application led September 28, 1905. Serial No. 280,416.

To (LZZ whom it may concern,.-

Be it known that I, HENRY G. Voici-IT, a citizen of the United States, residing at New Britain, Hartford county, Connecticut, have invented certain new and useful Improvements in Lock Mechanism, of which the following is a full, clear, and exact description.

My invention relates to improvements in lock mechanism.

The object of the invention is to construct a lock for attachment to doors of cells or rooms in asylums and the like places where it is desired to prevent tampering with the lock from the inside of the room. I have particularly sought to render the mechanism te; protecting the lock automatically opera e.

The invention consists in improvements the principles of which are illustrated in the accompanying two sheets of drawings.

Briefly, it comprises a locking-bolt, keyoperable means for retracting it accessible from the outer side, means for retracting it operable from the inner side, means for normally guarding or preventing access to the inner operating mechanism, means for automatically removing the guard from the inner operating mechanism when the bolt is withdrawn by the key from the outside, means for locking the guard when the door is closed, and means for returning the guard to its normal position when the door is again opened and closed.

Figure l is a plan view and horizontal section of a lock embodying the improvements of my invention, showing the parts in the position which they would occupy if applied to a door and the door were opened. Fig. 2 is a Jfront view of the lock. Fig. 3 is an inside View of the inner side plate with attached mechanism. Fig. 4L is an inside view of the outer side plate with attached mechanism. Fig. 5 is a perspective view of the guard and automatic operating mechanism. Fig. 6 is a perspective view of a latch for the guard for holding it in position with the inner operating mechanism accessible or exposed when the door is open.

The mechanism is shown in connection with a lock with prealined parts adapted to be secured to a door of any thickness within the range of adjustment of the lock, permitting a variation of thickness of about onehali' an inch. lThe mechanism is, however, adapted to be applied to mortise and other forms of locks.

I is a plate adapted to the inner side of the door, carrying mechanism for actuating the bolt from the inner side and also the guard and part of the automatic operating mechanism.

door and carrying the mechanism for actuating the bolt from the outer side.

3 is the iront or edge plate of the lock,

which is preferably carried by the outer side plate 2 and supports the bolt and the parts of the automatic guard-operating mechanism not carried by the inner side plate.

4 is a screw which passes through the outer side plate and takes into atapped socket 5 in the inner side plate. A plurality oi these i screws are provided-in this instance threeby which the two plates are clamped to the door. All of these screws are accessible from the outer side of the lock.

6 6 are posts rigidly carried by the inner side plate which tit snugly into sockets 7 7, carried by the outer side plate. By this postand-socket connection the two plates are given a delinite permanent alinement when the parts-are sent out from thefactory,but the posts permit adjustment of the two side plates and mechanism.

8 is a locking-bolt pivotally carried by the edge plate 3 and normally pressed outward by the spring 9.

l0 is a slidepconnected to the rear of the bolt.

11 is a roll-back for retracting the slide and bolt.

12 is a knob securely fastened to the outer side plate and preferably not rotatable.

13 is the body of a cylinder-lock mounted in the knob and having a plug 14, which is rotatable when the key is inserted. The end of the plug 14 has a recess slightly larger than the shank 15 of the roll-back, so that the roll-back may be turned from the inner side of the lock through an angle sufficient to retract the bolt when the plug 14 is stationary in the cylinder 13. When the key is inserted in the plug of the lock, the plug. can be rotated and the roll-back l1 rotated, when the play is taken up sufliciently to retract the bolt and open the door. When the door 2 is a plate adapted to the outer side of the l IOC is opened, the parts assume the position i shown in the drawings.

16 is an operator for an automatic dogging device, which is forced inward by contact with the ordinary striker-plate to prevent the retraction of the bolt by the insertion of an instrument at the edge of the door when the door is closed, the door being adapted to swing outwardly.

17 is a grip portion preferably secured to the lower edge of the inner side plate by which the attendant may conveniently pull the door to behind him when entering the room. It is so constructed, however, as to afford but little support for any object which may be hung upon it.

18 is a hub carried by the inner side plate and having a recess slightly larger than the spindle 19, so as to permit a limited movement of the spindle when the roll-back is turned by the operation of the-key from the outer side of the lock, but to permit of the retraction of the bolt by means of the -slide when the key is inserted in the hub from the iriner side of the lock. The hub may be constructed to be operated by any Iother means; but it is preferred to have an opening so as to receive the same key that properly coacts with the outer lock.

20 is a guard-plate having a shaft 21,which is pivotally mounted so that the plate may piartially rotate relatively to the inner side ate.

p 22 is a housing secured, preferably, by screws to the inner side plate and affording a bearing for the guard-plate and the hub.

23 is a lever pivoted at 24 on the inner side plate, having a segmental rack or gear 25 on lone arm, adapted to coact with the gearwith teeth 26, formed in the shaft of the guard. The other arm carries a projection 27, which stands back of the front plate 3 when the parts are assembled.

28 is an operator pivoted to the end plate and normallyrpressed outward bythe spring 29.

30 is a lip projecting from the operator to prevent its extension through the front plate 3 eyond its proper position.

31 is a pin carried by the operator and projecting back of the arm 27 when the parts are assembled.

32 is a spring mounted on one end of the pin 31. One arm of the spring abuts against the projection 33, carried by the operator, and the other end of the spring abuts against the projection 34 of the rocker-arm 27, so that the spring 32 presses the arm 27 toward the pin 31 of the operator. The guard is provided an opening 35 for access to the hub 18 when the parts are in the position shown in the drawings with the door open.

36 is a stop projecting from the rear of the guard into a slot in the housing 22, so as to limit the movement of the guard on its axis.

. with the hub 18.

37 is a pawl pivotally mounted in a slot in the end of the guard-shaft 21.

38 is'a spring lcarried by the pawl, which presses against the inside 'of the sleeve 39 of the housing, so as to hold the pawl in its proper positions.

40 is a latch-plate mounted so as to rotate It preferably seats against the end of the sleeve 41 of the housing and is held in place by a split ring 42. ,a

43 44 are notches in the edge of the latchplate 40 and into which the pawl 37 is adapted toseat at the proper times.

As before stated, the parts as shown are in the positions which they would occupy if the lock were applied to a door and the door opened. When the door is closed, the operator 28 hits against the striker-plate (not shown) of the door-frame and is forced inward. The spring 32 of the operator then exerts pressure against the projection 34 of the lever-arm 27, tending to tilt it so as to rotate the guard-shaft 21 clockwise as viewed in Fig. 3. The pawl 37, however, being seated in the notch 44 of the latch-plate 40 prevents the guard from turning. This leaves the guard-plate with the opening 35 in line with the hub 18, so that the attendant may insert his key in the hub and retract the bolt when he wishes to leave the room. When the key is inserted in the hub 18 and rotated to the right, the latch-plate 40 is rotated anticlockwise, vas viewed in Fig. 3, and the pawl 37 slips up the incline at the left of the notch 44 and seats in the shallow notch 43 at the same time that the bolt 8 is retracted by the slide 10 through the medium of the spindle 19 and the roll-back 11. The key is then withdrawn the door opened, and the attendant passes out. Upon closing the door the operator 28 again hits the striker-plate of the door-frame and is forced inward. This time the force of the spring 32 tilts the lever 23, and since the pawl 37 is in the shallow notch 43 there is but slight resistance to the turn-A ing of the pawl 37 and shaft 21, so that the guard-plate 20 is rotated so as to cover up the end of the hub 18, the guardlate coming to a stop when the pin 36 reac es the opposite end of the slot from the position shown in Fig. 3. The pawl 37 is then at substantially right angles to the position shown in Fig. 3 and out of engagement with the latch 40. When the bolt is retracted by the insertion of the key from the outer side, the latch 40 is brought around to the position shown in Fig. 3, so that when the door is opened and the operator 28 extended by the spring 29 the pin 31 by its engagement with the arm 27 tilts the lever, rotates the-guard 2O and its shaft, and brings the pawl 37 into position to snap int-o the notch 44, leaving the parts in the position ready for operation, as before described. This automatic operation is par- IOO IIO

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ticularly advantageous, inasmuch as the attendant cannot always be relied upon to set the guard before leaving the room. A further advantage oi the construction is that the only part of the guard-plate exposed to the inmate oi the room is an area substantially the same as the end of the hub 18.

What I claim is- 1. In a lock mechanism, a bolt, means for retracting the bolt accessible from each side of the door, a guard-plate for preventing access to the retractingmechanism from .they inner side oi the lock, means for moving the guard to permit access to the retracting mechanism at the inner side of the lock, and automatic means to move the guard to prevent access to said mechanism.

2. In a lock mechanism, a bolt, key-operable means accessible irom the outer side of the lock for retracting the bolt, an operatinghub accessible from the inner side of the lock tor retracting the bolt, a guard for said hub having a passage normally out of line with said hub, means f or operating said guard, and a plate covering and protecting all of the outer side of said guard except an area substantially equal to the end of the'hub.

3. In a lock mechanism, a bolt, means operable from the inner side of the lock for retracting said bolt, a guard-plate for preventing access to said means, means for moving said guard to permit access to said retracting means, means for holding said guard in position with the retracting means accessible, and means for automatically moving said guard to prevent access to said retracting means.

4. In a lock mechanism, inner and outer side plates, a front plate, a bolt, a hub carried by the inner side plate, means of connection between said hub and said bolt, and a guardplate mounted at the rear of said inner plate adapted to prevent access to said hub.

5. In a lock mechanism, inner and outer side plates, a front plate, a bolt, a hub carried by the inner side plate, means of connection between said hub and said bolt, a guardplate mounted at the rear of said inner plate adapted to prevent access to said hub, and a permanent housing forming a support for said guard-plate and said hub.

6.- In a lock mechanism, a bolt, a hub, means of connection between said hub and said bolt, a guard-plate for said hub, land means for automatically moving said guard to permit access to the hub when the door to which the lock is adapted is opened.

7. In a lock mechanism, a bolt, a hub, means of connection between said hub and said bolt, a guard-plate for said hub, means for automatically moving said guard .to permit access to the hub when the door to which the lock is adapted is opened, and means for latching said guard when the door is closed.

8. In a lock mechanism, a bolt, a hub, means ot connection between said hub and said bolt, a guard-plate for said hub, means for automatically moving said guard to permit access to the hub when the door to which the lock is adapted is opened, means for latching said guard when the door is closed, and means for moving said guard to cover said hub when the door is again opened and closed.

9. In a lock mechanism, a bolt, a hub, operative means of connection between said hub and said bolt, a guard for said hub, an operator retracted when the door to which the lock is adapted is closed. means of connection between said operator and said guard for automatically moving said guard to uncover said hub when said operator is extended upon opening the door.

10. In a lock mechanism, a bolt, a hub, operative means of connection between said hub and said bolt, a guard for said hub, a spring-pressed operator, connections between said operator and. said guard, and a latch for holding the guard in position with the hub exposed.

11. -In a lock, a bolt, a hub, operative means 'of connection between said hub and said bolt, a guard Jfor said hub, and a latch carried by said hub for locking said guard.

12. In a lock, a bolt, means accessible from the inner side of the lock for retracting` the bolt, a rotatable guard, and automatic means for rotating said guard operable by the closing of the door to which the lock is adapted.

13. In a lock, a bolt, a hub, means of connection between said hub and bolt a rotatable guard for said hub, and a pivoted springpressed lever for rotating said guard.

14. In a lock, inner and outer side plates, a front plate carried by said outer side plate, a bolt carried by said front plate, key-operable retracting means carried by said outer side plate, a hub having an operable connection with said retracting means, a guard carried by the inner side plate, a lever carried by said inner side plate and connected to said guard, an operator carried by said iront plate, and means of connection between said operator and said lever when the parts are assembled.

15. In a lock, a bolt, a hub, operative means of connection between said hub and said bolt, a guard for said hub, means Jfor moving said guard to expose said hub, means for holding said guard in position with the hub exposed, a projecting operator, and means of connection between said operator and said guard for releasing said guard.

HENRY G. VOIGHT.

Witnesses:

M. S. WIARD, C. E. RUssELL.

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